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Ogg

Ogg is a free, open container format maintained by the Xiph.Org Foundation. The creators of the Ogg format state that it is unrestricted by software patents and is designed to provide for efficient streaming and manipulation of high quality digital multimedia.


Ogg
Vorbis Logo
File Extention .ogv, .oga, .ogx, .ogg, .spx
Internet video/ogg, audio/ogg, application/ogg
Magic number OggS
Developer Xiph.Org Foundation
Type of format Container format
Container for Vorbis, Theora, Speex,FLAC, Dirac,etc.
Open format? Yes

    Ogg is a free, open container format maintained by the Xiph.Org Foundation. The creators of the Ogg format state that it is unrestricted by software patents and is designed to provide for efficient streaming and manipulation of high quality digital multimedia.

The Ogg container format can multiplex a number of independent streams for audio, video, text (such as subtitles), and metadata.

In the Ogg multimedia framework, Theora provides a lossy video layer. The audio layer is most commonly provided by the music-oriented Vorbis format but other options include the human speech compression codec Speex, the lossless audio compression codec FLAC, and OggPCM.

The term usually refers to the Ogg Vorbis audio file format, also contain Vorbis encoded audio into Ogg container format. In the past. Ogg this an extension had been used in any format Ogg support; However, since 2007, the Xiph.Org Foundation recommends that .ogg only be used for Ogg Vorbis audio files. The Xiph.Org Foundation decided to create a new set of file extensions and media types to describe different types of content such as .oga for audio only files, .ogv for video with or without sound (including Theora), and .ogx for multiplexed Ogg.

The Xiph.Org Foundation Ogg reference implementation, the latest version is lib ogg 1.2.0. Released on March 26, 2010, another version lib ogg2 can also find in the the Xiph.Org Foundation of SVN package library. The two libraries are free software released under the new BSD license.

Because it's an open source format, and its reference implementation not Copyleft form, whether free or proprietary, commercial or non-commercial media player, even the part of the manufacturers of portable media players and global positioning system receivers are used under Ogga variety of codecs.

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